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Finding the Fourth Proportional to 68,167.89, 94,070.57 and 39,878.37

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Solution

The fourth proportional to 68,167.89, 94,070.57 and 39,878.37 is: 55,031.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,167.89 : 94,070.57 = 39,878.37 : x
  2. Step 2: Convert to fraction form
    68,167.89/94,070.57 = 39,878.37/x
  3. Step 3: Cross multiply
    68,167.89x = 94,070.57 × 39,878.37
  4. Step 4: Simplify right side
    68,167.89x = 3,751,380,797.18
  5. Step 5: Solve for x
    x = 3,751,380,797.18/68,167.89
  6. Step 6: Final answer
    x = 55,031.49

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.